Abstract: A thermosensitive recording material having a high whiteness and capable of forming clear colored images with an excellent resistance to oil and plasticizers is provided with a thermosensitive colored image-forming layer formed on a substrate sheet and comprising a substantially colorless dye precursor, a binder and a color-developing agent comprising at least one aromatic compound among the formulae (II), (III) and (IV): ##STR1## wherein X is an oxygen or sulfur atom, A represents a multivalent group, E represents a multivalent group having at least one aromatic cyclic group, and n represents an integer of 2 or more.

Abstract: A thermosensitive recording material having a high thermosensitivity and useful for recording thereon colored images having high storage persistency, comprises a thermosensitive colored image-forming layer formed on a surface of a substrate sheet and comprising a colorless dye precursor; a color-developing aromatic compound having, per molecule thereof, at least one arylsulfonylureido group of the formula (I): ##STR1## wherein R.sup.1 =aromatic group unsubstituted or substituted with at least one of lower alkyl and lower alkoxyl group and hologen atoms; a sensitizing aromatic amide compound of the formula (II): ##STR2## wherein Ar.sup.1, Ar.sup.2 =non-substituted phenyl or naphthyl group or substituted phenyl or naphthyl group with 1 to 3 substituent selected from aryl, aryloxy, aralkyl, alkyl, alkoxyl, trihalogenomethyl, nitro and alkylamino groups and halogen atoms; and a binder.

Abstract: A thermosensitive recording material for recording thereon clear colored images having an excellent storage persistency over a long time, comprises a thermosensitive colored image-forming layer formed on a substrate and comprising a colorless dye precursor, a binder and a color developing agent comprising at least one compound having at least one group of the formula (I): ##STR1## wherein R = unsubstituted aromatic group or substituted aromatic group having at least one substituent selected from alkyl, alkoxyl and halogen, and the thermosensitive colored image-forming layer further comprises an additive comprising at least one member selected from the compounds of the formulae (II) and (III): ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 = alkyl, alkoxyl, aralkyl, aryl, aryloxy, nitro, acetylamino, acetoacetylamino, halogen or hydrogen; and Ar.sub.1, Ar.sub.

Abstract: A thermosensitive recording material capable of forming colored images having an excellent resistance to oily and fatty substances and plasticizers, even immediately after the formation of the colored image, comprises a thermosensitive colored image-forming layer formed on a substrate sheet and comprising a substantially colorless dye precursor, a color-developing agent comprising at least one diphenolcarboxylic acid compound of the formula ##STR1## wherein R.sup.1, R.sup.2 =H, halogen, alkyl, alkoxyl, acryl or aryl, R.sup.3 =H or alkyl, and n=0 or 1 to 8, a binder, and optionally, a colored image-stabilizing agent comprising at least one member selected from organic aziridine and epoxy compounds.

Abstract: A thermosensitive recording material capable of recording thereon clear colored images having high resistances to oily substances, plasticizers, moisture, and heat and an excellent storage persistency over a long time, comprises a thermosensitive colored image-forming layer formed on a sheet substrate and comprising a colorless dye precursor, a color developing agent, and a binder, the color developing agent comprising at least one compound of the formula (I): ##STR1## and the colored image-forming layer further comprising an additive comprising at least one selected from: (1) aromatic epoxy compounds, (2) aromatic aziridine compounds, (3) aromatic compounds of the formulae (II), (III) and (IV): ##STR2##

Abstract: A thermosensitive recording material having a high whiteness and capable of forming thereon colored images having an excellent oil and plasticizer resistance and persistency over a long time, comprises a thermosensitive colored image forming layer formed on a sheet substrate and comprising, together with a dye precursor and a binder, a color-developing agent comprising at least one compound of the formulae (I) to (VIII). ##STR1## wherein R.sub.1 =H, alkyl, aryl, aralkyl, alkenyl or cycloalkyl, R.sub.2 and R.sub.3 =H, alkyl, aryl aralkyl, alkenyl or acetyl, or are fuse-bonded to form a cyclic structure, R.sub.4 =alkyl, aryl, aralkyl, alkenyl, piperidino, succinimide, .rho.-benzylphenyl, etc., R.sub.5 and R.sub.6 =H, alkyl, aryl, aralkyl, alkenyl cycloalkyl, etc., or are fuse-bonded to form ##STR2## R.sub.7, R.sub.9, and R.sub.11 =unsubstituted or substituted aromatic groups with alkyl, alkoxyl, acyl, etc., R.sub.8, R.sub.10 and R.sub.

Abstract: A thermosensitive recording material, capable of providing colored images having a high resistance to oily substances and plasticizers and an excellent storage persistency for a long time, comprises a thermosensitive colored image-forming layer formed on a sheet substrate and comprising a colorless dye precursor, a color developing agent, a colored image-stabilizing agent comprising an aziridinyl compound and/or an epoxy compound, and an additional colored image-stabilizing agent comprising a primary or secondary amine compound and/or a carboxylic compound having a carboxyl group or --CO--O--CO-- group; the color developing agent preferably comprising a compound of the formula (I): ##STR1## wherein X is an O or S atom, R.sub.1 is an unsubstituted aromatic group, or a substituted phenyl group having a lower alkyl or a halogen atom, and R.sub.2 and R.sub.

Abstract: A thermosensitive recording material having a satisfactory high speed recording performance and whiteness and capable of forming colored images thereon having a high storage persistency for a long time, comprises a thermosensitive colored-image-forming layer formed on a sheet substrate and comprising a colorless dye precursor, a color-developing agent comprising benzyl p-hydroxybenzoate, a colored image-stabilizing agent comprising a member selected from aromatic aziridine compounds with one aziridine group and at least one aromatic cyclic group, and aromatic, aliphatic and cycloaliphatic aziridine compounds with two or more aziridine groups, and a binder.

Abstract: A thermosensitive recording material capable of recording thereon colored images having high resistances to oily substances, plasticizers, moisture, and heat and an excellent storage persistency over a long time, comprises a thermosensitive colored image-forming layer formed on a sheet substrate and comprising a colorless dye precursor, a color developing agent, and a binder, the color developing agent comprising at least one compound of the formula (I): ##STR1## wherein X is an O or S atom, R is an unsubstituted aromatic group or an aromatic group substituted by a lower alkyl or halogen atom; A represents a multivalent group, and n is an integer of 2 or more.

Abstract: A thermosensitive recording material capable of recording thereon colored images having high resistances to oily substances, plasticizers, moisture, and heat and an excellent storage persistency over a long time, comprises a thermosensitive colored image-forming layer formed on a sheet substrate and comprising a colorless dye precursor, a color developing agent, and a binder, the color developing agent comprising at least one compound of the formula (I): ##STR1## wherein X is an O or S atom, R.sup.1 is an unsaturated aromatic group or a substituted phenyl group having a lower alkyl or halogen atom and R.sup.2 and R.sup.3 are respectively a hydrogen atom, alkyl, aralkyl, substituted alkyl having an aryloxy, unsubstituted aromatic group, or substituted aromatic group having at least one substituent selected from alkyl, aryl, aralkyl, alkyloxy, alkyloxycarbonyl, aryloxycarbonyl, aralkyloxycarbonyl, and arylsulfonyl groups, and halogen atoms.

Abstract: A heat-sensitive recording material with an excellent recording sensitivity and capable of recording thereon high quality images at a high recording speed, comprising a heat-sensitive color-forming layer formed on a substrate sheet and comprising a colorless dye precursor, a color-developing agent, a binder and a sensitizing agent consisting essentially of 1,2-diphenoxybenzene.

Abstract: A heat-sensitive recording material with an excellent recording sensitivity, heat stability and resistance to the whitening phenomenon, comprising a heat-sensitive color developing layer formed on a substrate sheet and containing, in addition to a colorless dye precursor, color developing agent and binder, a heat-fusible sensitizing agent consisting essentially of at least one member selected from 1,4-bis(p-tolyloxy)benzene, 1,4-bis(3', 4'-dimethylphenyloxy)benzene and 1,4-bis(3',5'-dimethylphenyloxy)benzene, in an amount of 10% to 1,000% based on the weight of the color developing agent.

Abstract: An electrophotographic material having an enhanced sensitivity to laser rays comprises,(A) an electroconductive substrate, and(B) a laser-sensitive electrophotographic layer comprising (a) a finely divided photoconductive zinc oxide, (b) a resinous binder, (c) a sensitizing coloring material comprising at least one member selected from the compounds of the formulae (I) and (II): ##STR1## in which m.sup.1, m.sup.2, n.sup.1 and n.sup.2 are 1 to 8, R.sup.1 and R.sup.2 are --COO or --SO.sub.3, R.sup.3 and R.sup.4 are H, --CH.dbd.CH.sub.2 --COOH, --SO.sub.3 H, --COONa, --SO.sub.3 Na, COOK or --SO.sub.3 K, X is Cl, Br, I or --ClO.sub.4, ##STR2## and, (d) a sensitizing assistant comprising at least one carboxylic anhydride of the formula (III): ##STR3## wherein R.sup.5 and R.sup.6 are H, C.sub.1-8 alkyl or phenyl.

Abstract: A composition useful for rapidly and safely effecting a fat-desensitizing treatment for litho printing plates with a high efficiency, and for providing a hydrophilic membrane having a high durability in printing operations on the surfaces of the litho printing plates, comprises (A) a phytic acid or its functional derivative; (B) a metal salt of the formula MX.sub.

Abstract: A partially saponified polyvinyl acetate having at least one stilbazolium group-containing photosensitive unit represented by the following general formula: ##STR1## (wherein R.sub.1 is hydrogen atom, an unsubstituted or substituted alkyl group, an alkenyl group or an aralkyl group, R.sub.2 is hydrogen atom or an unsubstituted or substituted alkyl group, Y is a conjugated base of an inorganic or organic acid, m is an integer of 1 to 6, and n is 0 or 1) and an acetal unit represented by the following general formula: ##STR2## (wherein R.sub.3 is hydrogen atom or an alkyl group); the acetal units being contained therein in an amount of approximately 0.5 to 10.0 mol % with respect to mole of the polyvinylalcohol units thereof; the stilbazolium group-containing units being contained therein in an amount of approximately 0.5 to 5.